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Oxidation Studies of T-91 and T-22 Boiler Steels in Air at 900°C

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DOI: 10.4236/jmmce.2010.98053    4,472 Downloads   6,119 Views   Citations

ABSTRACT

The oxidation behaviour of T-91 steel and T-22 steel in air has been studied under isothermal conditions at a temperature of 900°C in a cyclic manner. Oxidation kinetics was established for the T-91 steel and T-22 steel in air at 900°C under cyclic conditions for 50 cycles by thermogravimetric technique. Each cycle consisted of 1 hour heating at 900°C followed by 20 min of cooling in air. T-91 steel sample followed somewhat linear rate of oxidation while T-22 sample followed the parabolic rate law of oxidation. X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray (SEM/EDAX) techniques were used to characterise the oxide scales. T-91 steel was found to be more corrosion resistance than T- 22 steel in air oxidation for 50 cycles.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

D. Gond, V. Chawla, D. Puri and S. Prakash, "Oxidation Studies of T-91 and T-22 Boiler Steels in Air at 900°C," Journal of Minerals and Materials Characterization and Engineering, Vol. 9 No. 8, 2010, pp. 749-761. doi: 10.4236/jmmce.2010.98053.

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